/**

This file is part of MaCI/GIMnet.

MaCI/GIMnet is free software: you can redistribute it and/or modify it 
under the terms of the GNU Lesser General Public License as published 
by the Free Software Foundation, either version 3 of the License, or 
(at your option) any later version.

MaCI/GIMnet is distributed in the hope that it will be useful, but WITHOUT 
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public 
License for more details.

You should have received a copy of the GNU Lesser General Public 
License along with GIMnet. (See COPYING.LESSER) If not, see 
<http://www.gnu.org/licenses/>.

**/
#ifndef GLPROVIDER_H
#define GLPROVIDER_H

/**
This is an interface that defines setting for OpenGL when drawing world and
objects in it. World provides instance of this interface to objects that need
opengl's setting (eg. camera).
*/

class CGLProvider
{
  public:

    virtual ~CGLProvider(){};

    virtual int CreateNewContext(int w, int h, const char* name)=0;
    
    virtual bool SetContext(int id)=0;
        
    /**
    This should set active the context that the gui provides.
    Use this if using other contexts and want to switch back to gui.
    */
    virtual void ResetContext()=0;


    virtual void GetCameraParams(float& aX,
                         float& aY,
                         float& aZ,
                         float& aPan,
                         float& aTilt)=0;

};

#endif
